Noise during Fast Moving Scenes

[cornetet]

I dont know the appropriate technical terms to describe this, so I'll use my own words...

After converting a DVD-movie to a DivX5-movie I'm noticing during FAST MOVING SCENES, there are horizontal lines that appear as some type of NOISE for just a frame or two. It almost looks like a 'splintering' effect. I can really notice them when I slow down the playback to quarter-speed.

WHAT ARE THESE LINES AND HOW CAN I REMOVE/MINIMIZE THEM DURING MY DIVX5 CREATION PROCESS?

p.s. all of my movies are high bitrates, 1200kBits - 1800kBits per second.

[Acaila]

Sounds like your video is interlaced. Check out this great doc (http://forum.doom9.org/showthread.php?s=&threadid=34718) that explains what you can do to get rid of it.

[JohnMK]

Yep, it's not as simple as just bumpbing up the bitrate. :D Sometimes you have to break down and use a filter or two.

[cornetet]

I realize I have 3 choices right before the SAVE&ENCODE step in Gknot. They are:

1. Use Fast Deinterlacing, which cuts the vertical resolution in half
2. Use Field Deinterlacing, which blends pixels to eliminate interlace artifacts
3. Use another AviSynth filter, such as Telecide.

So in someone's expert opinion, which one do I choose if I'm seeing some split-second artifacts during fast moving scenes?

[JohnMK]

All three of those are part of the same filter: decomb. FieldDeinterlace is the best option if you have a truly interlaced NTSC source. If you're talking about Hollywood feature films/movies, however, you'll want to use Telecide() Decimate(), and certainly NOT FieldDeinterlace.